Don't forget to utilize the internet, as well! :-) There are lots of websites that are dedicated to writing, grammar, etc. I often use them when I can't quite work out how to write a particular scene. For example, not long ago I ended up wanting to write a scene where one character interrupts another. After a quick search and some cross-checking (I like to see multiple sources saying X method is correct), I was good to go.
RE: Critique My Writing - Cars, Coffee, and Cows